Tobacco pipe



W. FELDER Aug. 6, 1968 TOBACCO PIPE 5 Sheets-Sheet 1 Filed Sept. 8, 1966 INVE N'TOR WALTER 7 51.023

A'ITQRNEY Aug. 6, 1968 -w. FELDER 3,395,715

TOBACCO PIPE Filed Sept. 8, 1966 5 Sheets-Sheet 2 INVENTOR UAl-Ttp Fe'mse AW Y W. FELDER TOBACCO PIPE 5 Sheets-Sheet, 5

Filed Sept. 8. 1966 AZ 7 M\ M I 1 1 1 1 1 1 a 1 1 I l n u I 1 I Z l 9 K J Q Q T1 31 J 1 Q Q E W 9 F V ,1. 1L?

Wm w ATTOQNEY 3,395,715 TOBACCO PIPE I Walter Felder, 162 Ellison Road, Streatham, London SW. 16, England Filed Sept. 8, 1966, Ser. No. 578,045 Claims priority, application Great Britain, Oct. 29, 1965, 45,799/65; Mar. 31, 1966, 14,219/66 6 Claims. (Cl. 131-184) The present invention relates to a tobacco pipe and has the main objects of separating condensate from the smoke on its way from the bowl to the outer end of the mouth piece, and of facilitating the cleaning of the pipe. Other objects will become apparent from the following description of some embodiments with reference to the accompanying drawings.

With these objects in view I provide a tobacco pipe comprising in combination: a pipe bowl, a pipe stem integral with said bowl, a longitudinal bore being provided throughout the length of said pipe stem, a mouth piece member having an extension inserted in said bore, said extension having a middle portion of an external diameter slightly smaller than the internal diameter of said bore and two reduced diameter portions fore and aft said middle portion, said middle portion leaving a narrow clearance between its periphery and the internal surface of said bore forming an annular duct, and said reduced diameter portions forming two moisture trap chambers between themselves and said bore, one of said chambers being located adjacent said bowl and in communication therewith, and the other chamber being adjacent the free end of said pipe stem and in communication with a bore in said mouth piece member leading outside, said two moisture trap chambers being in communication with each other by said annular duct.

Preferably said pipe comprises a tubular lining of said bore extending over the whole length thereof and insulating said pipe stern against direct contact with the smoke, said lining forming a condenser tube for the moisture contained in the smoke.

Preferably the moisture trap chamber adjacent the free end of said pipe stem is in communication with the bore in said mouth piece member leading outside through a curved duct set back in said chamber so as to prevent condensate from fiowing back into said bore in said mouth piece member.

Lugs may be provided on said forward reduced diameter portion of said extension flanking the opening forming the communication between said bowl and said forward moisture trap chamber and guiding the smoke from said bowl into said chamber, while preventing condensate from flowing back from said chamber into said bowl.

An insert may be fitted into said bowl, said insert in operation receiving the tobacco and insulating said bowl against direct contact with the burning tobacco. Said insert may be fitted into said bowl with clearance, and a heat resistant thermally insulating fibre material such as glass wool may be provided in said clearance. A rim may be tightly fitted into the open end of said bowl to retain said insert in the bowl.

In an alternative embodiment said extension comprises an outer part having a central bore leading outside and a curved duct connecting said central duct with said rear moisture trap chamber, said outer part being fitted into said bore in the pipe stem and forming with its periphery said annular passage, and an inner part of reduced diameter fitted into a blind bore in the forward end of said outer part and having a collar at its forward end fitting into said bore in the pipe stem adjacent said pipe bowl, said inner part forming between itself and said bore in the pipe stem said forward moisture trap chamber and having a central duct at its forward end communicating nited States Patent 3,395,715 Patented Aug. 6, 1968 ice with said bowl and at its rear end communicating with said forward moisture trap chamber through a curved duct portion. A toroid spacer member may be fitted on said reduced diameter inner part adjacent said collar and having an outer diameter substantially corresponding to the internal diameter of said bore.

These and other features of my said invention will be clearly understood from the following description of two embodiments thereof given by way of example with reference to the accompanying drawings, in which:

FIG. 1 is a longitudinal section on the line A-A of FIG. 2 of a first embodiment of a tobacco pipe according to my invention.

FIG. 2 is a plan view of the embodiment shown in FIG. 1.

FIG. 3 is a cross section on the line BB of FIG. 1.

FIGS. 47 are transverse sections on the lines CC, DD, BE and F-F, respectively, of FIG. 1.

FIG. 8 is an end view in the direction of the arrow G of FIG. 1.

FIG. 9 is a longitudinal section on the line A of FIG. 10 of a second embodiment of a tobacco pipe ac cording to my invention.

FIG. 10 is a plan View of the embodiment shown in FIG. 9.

FIGS. 11-15 are transverse sections on the lines BB, C'--C, D'D, BE and F'- of FIG. 9.

Referring firstly to FIGS. 1-8, the tobacco pipe according to my invention comprises a body 1 integral with a bowl 11 machined or manually carved out of asuitable natural Wood or warm-pressed in a die from artificially improved wood such as wood fibres mixed with synthetic lacquer or resin and compressed; a condenser tube 2 inserted in a longitudinal bore of the pipe body 1 extending through the length of the pipe stem perpendicular to the bowl 11 and preferably produced by pressure casting or by drawing from a suitable aluminum alloy; a preferably exchangeable bowl insert 3 made eg of briar, meerschaum or any suitable stone ware; a bowl rim 4 preferably made of briar or by warm-pressing in a die from artificially improved wood mixed with asbestos powder; and mouth piece body 5, preferably made by injection moulding from a thermo-plastic synthetic substance.

Chamber 23, which may be filled with air or with heat resistant and thermally insulating fibres such a glass wool, are provided between the bowl 11 and insert 3. A neck 12 at the bottom of the insert 3 is in communication with the interior of the condenser tube 2 through an inlet port 22. The mouth piece body or member 5, which at its outer end has an oblong opening 19 and has a central bore 20 leading to this opening, is inserted with its inner portion into the condenser tube 2, its bore 20 being in communication with a moisture trap chamber 17 in the interior of the condenser tube 2 through a curved duct 18, which is set forwardly in the chamber 17 in order to prevent condensate accumulating in said chamber from flowing rearwardly into the bore 20, when the bowl is tilted upwardly.

The mouth piece body 5 has an extension 24, preferably of hollow cylindrical shape centered in the tube 2 by means of short ribs 21 so as to leave a narrow annular duct 26 between the outer circumference of the extension 24 and the inner circumference of the condenser tube 2. Under the bowl 11, the extension 24 is continued by a stem 15 carrying a plug 25, plugging the condenser tube 2, and two lugs 16 flanking the inlet port 22. An annular moisture trap chamber 14 of larger cross-sectional area than the duct 26 is provided in the condenser tube 2 around the stem 15 between the plug 25 and the extension 24. These lugs guide the smoke from the neck 12 into the condenser tube 2 and prevent condensate from flow ing back into said neck.

In use, well loosened tobacco is filled into the insert 3 of the bowl 11, and ignited. Fresh air is sucked through the insert 3 and is warmed up when passing through the Zone of ashes and the glowing tobacco. At the same time, the tobacco underneath the glowing tobacco layer is heated, and gives off its moisture to the warm air passing through it, which is thus converted into smoke fumes and saturated with water vapor. This smoke, wholly or partly saturated, passes through the inlet port 22 into the condenser tube 2 and flows under the suction applied by the smoker at increased speed through the narrow annular duct 26 between the cylindrical extension 24 and the comparatively cool inner surface of the condenser tube 2. Thereby the smoke is cooled below the dew point and moisture is deposited by condensation; the heat discharged by the smoke is given off to the ambient atmosphere through the wall of the condenser tube 2 and of the pipe stem 1. The smoke then reaches the moisture trap chamber 17 surrounding the inner portion of the mouth piece member 5, and is sucked from there through the curved duct 18 into the central duct 20 of the outer portion of the mouth piece member 5. Conversely, when the smoker breathes out into the mouth piece member through the opening 19, comparatively moist air is blown through the condenser tube 2, where part of its moisture condenses. This air, thus made comparatively dry, may subsequently draw humidity from the tobacco in the insert 3, when passing through the same. The condensate deposited in both operations is collected in the moisture trap chamber 14, from where it cannot flow back into the mouth piece member 5 or up into the bowl 11, owing to gravity, in whatever position the pipe is held. When withdrawing the mouth piece member 5, 24, 15, 25, the condenser tube 2 or bore in the pipe stem is cleaned.

Referring now to FIGS. 9-15, the body 1 of the pipe, which is preferably made of briar and is integral with the bowl 11, has a longitudinal cylindrical bore lined by a condenser tube 2' preferably consisting of stainless steel or an aluminum alloy, A mouth piece member 5, preferably made of a bite-resisting flexible synthetic resin, has an oblong opening 19 at the outer end and a central circular bore 20 terminating in a downwardly curved duct portion 18 at the inner end, which leads into the moisture trap chamber 17 within the rear end of the condenser tube 2 forming a barrier to the condensate. The forward portion of the mouth piece member 5' extends into the middle of the length of the condenser tube 2, from which it is spaced by an annular narrow duct 26,, in which the smoke flows and moisture is condensed. At the forward end of the mouth piece body 5' a central blind bore is provided, in which the cylindrical end of a forward part or guide body 35 is inserted with a firm fit, which guide body is preferably made of a hard thermo-stable synthetic resin.

This forward part or guide body has a central duct 33 leading rearwardly through an upwardly curved duct portion 32 into the annular moisture trap chamber 14 also forming a barrier to the condensate within the forward portion of the condenser tube 2, and at its forward end has a flaring opening 34 communicating With an opening at the lower end of the bowl 11. The guide body 35 is centered in the condenser tube 2 by the aid of a toroidal or belled annular member 30 preferably made of flexible thermo-stable synthetic resin, and at its forward end has a collar 31 fitted with an easy fit or with slight clearance into the forward end of the condenser tube 2'.

For use, well loosened tobacco is filled into the bowl 11 and is ignited on top. Smoke containing condensable moisture is sucked from the bottom of the bowl 11 through the flaring opening 34 into the central duct 33 of the guide body 35, which it leaves through the upwardly curved duct 32 and enters into the moisture trap chamber 14, which forms a firstrnoisture barrier.

Condensation of the condensable moisture contained in the smoke takes place mainly by contact with the large area of the comparatively cool condenser tube 2', when the smoke flows at high velocity through the narrow annular gap 26 into the rear moisture trap chamber 17, which forms a second moisture barrier and from where the smoke rises through the curved duct 18 into the central duct 20 of the rear part 5 of the mouth piece body, which it leaves through the oblong opening 19.

The condensate deposited in the narrow annular gap 26 may flow either into the moisture trap chamber 14 or into the moisture trap chamber 17, depending on the angle at which the pipe is held, but cannot flow into the interior of the bowl 11 owing to the curved duct portion 32, or from the moisture trap chamber 17, owing to the curved duct portion 18, into the central duct 20 of the rear part 5 of the mouth piece member.

For cleaning purposes, the mouth piece member 5, with the guide body 35 firmly inserted in it, is withdrawn from the condenser tube 2', which then can be readily cleaned. The rear part of the mouth piece body and the guide body 35 can likewise be readily cleaned outside the pipe body, and if necessary be separated from one another for replacement of one component or the other.

While I have described herein and illustrated in the accompanying drawings what may be considered typical and particularly useful embodiments of my said invention, I wish it to be understood that I do not limit myself to the particular details and dimensions or materials described and illustrated; for obvious modifications will occur to a person skilled in the art.

What I claim as my invention and desire to secure by Letters Patent, is:

1. A tobacco pipe comprising in combination: a pipe bowl, a pipe stem integral with said bowl, a longitudinal bore means being provided throughout the length of said pipe stem, a mouth piece member having an extension inserted in said bore means, said extension having a middle portion of an external diameter slightly smaller than the internal diameter of said bore and two reduced diameter portions fore and aft of said middle portion, said middle portion leaving a narrow space between its periphery and the internal surface of said bore forming an annular duct, and said reduced diameter portions forming two moisture trap chambers between themselves and said bore, one of said chambers being located adjacent said bowl and in communication therewith, and the other chamber being adjacent the free end of said pipe stern and in communication with a bore in said mouth piece member leading outside, said two moisture trap chambers being in communication with each other by said annular duct.

2. A tobacco pipe as claimed in claim 1, comprising a tubular lining of said bore extending over the whole length thereof and insulating said pipe stem against direct contact with the smoke, said lining forming a condenser tube for the moisture contained in the smoke.

3. A tobacco pipe as claimed in claim 1, wherein said moisture trap chamber adjacent the free end of said pipe stem is in communication with said bore in said mouth piece member and including means providing a curved duct in the rear portion of said chamber so as to prevent condensate from flowing back into said bore in said mouth piece member.

4. A tobacco pipe as claimed in claim 1, comprising lugs provided on said forward reduced diameter portion of said extension flanking an opening forming the communication between said bowl and said forward moisture trap chamber and guiding the smoke from said how] into said chamber, while preventing condensate from flowing back from said chamber into said bowl.

5. A tobacco pipe as claimed in claim 1, wherein said extension comprises an outer part having a central bore and a curved duct connecting said central bore with said rear moisture trap chamber, said outer part being fitted into said bore in the pipe stem and forming with its periphery said narrow annular passage, and an inner part of reduced diameter fitted into means providing a blind bore in the forward end of said outer part and having a collar at its forward end fitting into said bore adjacent said pipe bowl, said inner part forming between itself and said bore in the pipe stem said forward moisture trap chamber and having a central duct at its forward end communicating with said bowl and at its rear end communicating with said forward moisture trap chamber through a curved duct portion.

6. A tobacco pipe as claimed in claim 5, comprising a toroid spacer member fitted on said reduced diameter inner part adjacent said collar and having an outer diameter substantially corresponding to the internal diameter of said bore.

References Cited UNITED STATES PATENTS 7/1923 Lasure 130-220 X 8/1924 Nichols 131-201 2/1925 Fioroni 131-184 9/1929 English et a] 131-184 10/1935 Bowles 131-184 8/1940 Blum 131-196 X FOREIGN PATENTS 1903 Great Britain. 3/ 1920 Great Britain. 9/ 1923 Great Britain. 5/1927 Great Britain.

JOSEPH S. REICH, Primary Examiner. 

1. A TOBACCO PIPE COMPRISING IN COMBINATION: A PIPE BOWL, A PIPE STEM INTEGRAL WITH SAID BOWL, A LONGITUDINAL BORE MEANS BEING PROVIDED THROUGHOUT THE LENGTH OF SAID PIPE STEM. A MOUTH PIECE MEMBER HAVING AN EXTENSION INSERTED IN SAID BORE MEANS, SAID EXTENSION HAVING A MIDDLE PORTION OF AN EXTERNAL DIAMETER SLIGHTLY SMALLER THAN THE INTERNAL DIAMETER OF SAID BORE AND TWO REDUCED DIAMETER PORTIONS FORE AND AFT OF SAID MIDDLE PORTION, SAID MIDDLE PORTION LEAVING A NARROW SPACE BETWEEN ITS PERIPHERY AND THE INTERNAL SURFACE OF SAID BORE FORMING AN ANNULAR DUCT, AND SAID REDUCED DIAMETER PORTIONS FORMING TWO MOISTURE TRAP CHAMBERS BETWEEN THEMSELVES AND SAID BORE, ONE OF SAID CHAMBERS BEING LOCATED ADJACENT SAID BOWL AND IN COMMUNICATION THEREWITH, AND THE OTHER CHAMBER BEING ADJACENT THE FREE END OF SAID PIPE STEM AND IN COMMUNICATION WITH A BORE IN SAID MOUTH PIECE MEMBER LEADING OUTSIDE, SAID TWO MOISTURE TRAP CHAMBERS BEING IN COMMUNICATION WITH EACH OTHER BY SAID ANNULAR DUCT. 